Casement-window adjuster



. Dec. 3, 1929. D. G. BUTTS GASEMENT WINDOW DJUSTER Filed June 12, 1928 IN VEN TOR.

@ATTORNEYS QN Il Patented Dec. 3, 1929 UNITED STATES DANEL Gr.V BUTTS, GB' COVINGTON, LOUSIANA CASEMENTeWINDOW ADJUSTER Application filed June 12,

This invention relates to improvements in easement Window adjusters or devices for releasably locking easement Windows and the like in any desired position.

Devices of this character usually comprise telescoping members one of which is secured to the Window frame and the other to the Window sash so that as the Window is opened and closed, such telescoping` members Will slide one Within the other. When it is desired to retain the Window in a certain po` sition these telescoping members are held against accidental relative movement by a clamp and it is to this last feature that the present invention is more particulary directed.

One obj ect of the invention is to simplify the design and. therefore, the construction of the telescoping members.

A further object is to provide a novel form of clamp for the telescoping members. The present clamp is not only simple in construction but the Wedging surfaces are reduced to a minimum so that there is little likelihood of the parts sticking but they can also be easily manipulated in locking` and releasing1 the clamp. The simplicity of this clamp is further reduced by reason of the fact that no fastening means, in the nature of screws or bolts, or the like, are required in attaching lVith these and other objects in view the invention consists in certain novel details of construction and combinations and arrange ments of parts all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims. i

In the accompanying; drawings.

Figure 1 is a side View of an adjuster constructed in accordance with the present invention.

Fig. 2 is a top plan view of the same;

Fig. 3 is a crosssection on the line 3-3 of Fig. 1;

Fig. l is a longitudinal sectional view on the line 1 -4 of Fig. 3; and

Fig. 5 is a detail View of a portion of one of the telescoping members. 50 In accordance With usual practice the pres- 192e. serial no. 284,761.

ent adjuster comprises two telescoping bars 10, 11, the former being pivoted at one end on a bracket 12 adapted to be attached to the Window frame and the other being` pivotally attached to a bracket 13 adapted to be secured to the Window sash. Bar 1l telescopes Within the free end of bar 10, this end f bar 10 being' offset as at lll. Both bars are angular in cross-seetion, preferably being of V-shaped or right angle crosssection as shown. This peculiar cross-section lends the necessary rigidity and strength to the bars even though they are comparatively light. Furthermore, this peculiar cross-section, together with the off-set portion 14 of bar 1U, reduces the friction between the bars to a minimum.

The offset end 14 of bar 10 has recesses 15 formed in its opposite side edges for the reception of the side arms 16 of a clamping yoke Whose base portion 17 preferably conforms to the cross-section of the bars 10, 1l. so as to iit snugly in the angle of bar 11. The

shoulders formed on the sides of bar 10 by recesses 15 prevent longitudinal movement of this clampingyoke and said yoke is re-` tained on the tivo barsby a Wedge member preferably in the form of a ring 18, one of Whose faces is formed With a cammina' surface, as at 19. Ring 18 is loose in arms 16 but the diameter of said ring' is greater than the length of slots 20 in said arms througgh which said ring;v projects so that said ringr cannot be removed except by spreading said arms apart.

RiniP 18 engages the crest or angle of bar 10 and While the wedginp; action. for forcing the bars against base 17 of the clamping` yoke might be generated by lnivinp; either one of the faces of the ring formed. with the camming1 surface 19, said camminfi; surface is prefer ably formed on that face of the ring Which engages bar 10. In this Way, there is only a line contact between the cammini;` member and said bar at the very crest of the bar and as a result these parts are not apt to stick but may be released with comparatively little pressure. i y

`Ring` 1S is preferably rotatable in arms 16 ofsaid yoke in a plane transverse of said bar 10 but it will be understood that this trans* tained in said side arms, and a camming surverse movement of the camming surface 19 face on said ring rotatable in a plane disposed with respect to bar 10 may be obtained by transversely ofthe angle formed in said yoke other than a rotary movement of the wedging base.

member orA ring.

The operation'of the device will be apparent. To lock the two bars against relative longitudinal movement wedging` member 18 is moved relatively to bar 10 so as to bring the high portionsof camming surface 19 into engagement with the angle or crest of said bar. This will firmly wedge the two bars between said member and the base 17 of the clamping yoke where they will be securely held until member 18 is again manipulated to disengage the high portions ofrsaid surface 19 from bar 10. i y v What I claim is:

1.1m. a device of the. character. described, theeombination of av pair of teleseoping. bars, clamping yoke'having a baseportion with arms at yopposite sidesthereof embracing said telescoping. bars, and arotatable clamping member secured in said side arms, said clamping member havingacamming surface adapted tov clamp thetelescoping bars againstfthe base of saidA yoke. 2. In a device of the character described, the combinationy of a pair of telescoping bars, afclampingfyoke having a base-portion and arms at .opposite sides thereof .embracing said bars, said yoke arms having alined slots therein, a clamping ring loose in said. slots, the length of said slots being less than the diameter of said. ring, andvacam surface on said ring engaging vone of said bars and adapted to clamp saidibars against the base of said.yoke. 3.' In a device of the character described, the combination of a pair of telescoping bars of right angle cross-section, a yoke having a base conforming to rthe cross-section of said barato fit in the angleof oneof the bars,.and

a cammember' carried by said yoke and'engaging the other bar, said cam member being rotatable .in saidf yoke to force the .two bars against the base of the yoke.

4. InV a.Y device of the character described,

' thecombination of a pair Yof telescopingbars of angular crossfsection, a yoke having anan- Vgular base adapted to fit in the angle of one of said bars side arms-on said yoke', a clamping member loosely retained in said arms and a` cam-ming surface on said clamping member bearing' against the angle of the other bar `at a Vpoint inregistryl withl the yoke base.

V5. A clamp forcasement .window adjusters ycomprising afyok'e having albaise provided with a clampingsurtace and side arms each ormedwith al-ined slots, and a clamping ring rotatable/in said/slats extending 4transversel-y` of'said base, saidr-inghavinga camming surface opposed'to the-baseofsaidyoke.

y' 6. A clam? for Casement window adjusters consistingo af yoke having aY V- shaped base and side arms, -a clamping' ringjrotatably re- DANIEL G. BUTTS. 

